SR4 - Audison 4-Channel 360W Power Amplifier with Crossover SR4 - Audison 4-Channel 360W Power Amplifier with Crossover Nominal power (RMS) @12 VDC; 1% THD : 4 Ch @ 4  45 W x 4 Output power (RMS) @14.4 VDC; 1% THD: 4 Ch @ 4  65 W x 4 4 Ch @ 2  90 W x 4 3 Ch @ 4  60 W x 2 + 190 W x 1 2 Ch @ 4  175 W x 2 Fully by-passable crossover FILTERS Removable panel to hide and protect controls Dimensions: WxHxD (inches) 87/16 x 21/8 x 161/16